Valve



2 Sheets-Sheet 1 .1

(No Model.)

- G.ANDERSON.

VALVE.

No. 477,398. Patented June 21, 1892.

2 SheetsSheet 2. G. ANDERSON.

VALVE.

(No Model.)

UNITED STATES- PATENT OF ICE...

GILBERT ANDERSON, OF CHICAGO, ILLINOIS.

VALVE.

SPECIFICATION forming part of Letters Patent No. 477,398, dated June 21,1892. Application filed June 23, 1891- Serial No. 397,257- (No model.)

To to whom zit may concern:

Be it known that I, GILBERT ANDERSON, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illi nois, haveinvented certain new and useful Improvements in Valves, of which thefollowing is a specification, reference being had to the accompanyingdrawings, in Which- Figure 1 is a vertical section on line 1 l of Fig.2. Fig. 2 is a top or plan view of the valve chamber and seat. Fig. 3 isa vertical section on line 3 3 of Fig. 2. Fig. 4 is a top or plan viewof the valve-stem, and Fig. 5 is a bottom View of the valve-stem.

My invention relates to valves, and more particularly to that classcalled balanced valves, which are adapted to be used in hydraulicmachinery where the valves are subject to great pressure, such as inhydraulic cranes.

The object of my invention is to simplify and improve the constructionof valves of this class, and I accomplish this object as hereinafterspecified, and as illustrated in the drawings.

That which I regard as new will be pointed out in the claims.

In the drawings, A indicates the valve-casing, in which is a cylindricalvalve-chamber B. a a indicate pipes, which are preferably cast integralwith the valve-casing, and which are adapted to conduct water into thevalvechambor B through ports I) b, which open into the valve-chamberthrough the bottom of said chamber. The pipes at a are preferablyscrew-threaded, as best shown in Fig. 1, so that the proper connectionsmay easily be made. As best shown in Fig. 2, the ports I) b are locatedabout forty-five degrees from each other on the arc of a circle and arepreferably shaped as shown in the drawings. The pipes a a, which lead tothe ports I) b, are preferably in the same straight line on oppositesides of the valve-casing; but they may be located at any other points,if desired.

0 indicates a pipe, which is also preferably cast integral with thevalve-casing, and which leads to a port a, which opens into thevalvechamber at a point a short distance above the bottom of saidchamber, as best shown in Fig. 3. The port 0 may be located at anysuitable point in the Valve-chamber, but is preferably at a pointequidistant from the ports I) b and at the opposite side of thevalve-chamber.

D indicates the valve-seat, which is flat and has a central opening orpassage d, which leads to a waste-pipe. If desired, by making suitableconnections with the passage (1 the water as it passes from thevalve-chamber, as will be hereinafter described, may be conducted backto a reservoir and used over again.

E indicates a cap, which is adapted to be screwed upon the valve-casingto tightly seal :the valve-chamber, the valve-chamber being internallyscrew-threaded at its upper portion to receive the threads of the cap,as best shown in Figs. 1 and 3.

The capE is provided with a gland 6, adapted to be screwed upon it atits upper end. The gland e is adapted to tightly fit the valvestem F,the upper end of which passes 111 ward through the cap E, as shown inthe drawings. Any suitable packing may be used to prevent leakagethrough the cap E and gland e.

The valve-stem F is somewhat bell-shaped, its lower end being circularand adapted to fit tightly into' the valve-chamber B, as best shown inFig. 1, while its upper portion is elongated into a stem, which isadapted to pass through the cap, as hereinbefore described. Near theupper part of that portion of the valve-stem which fits into the chamber13 is provided a peripheral groove f, which is shaped as shown in Fig.1, being angular at the top and inclining gradually outward to the sidesof the valve-chamber. By making the groove f in this manner a projectinglip f is formed, as best shown in Figs. 1 and 3. The groove f is solocated on the valve-stem that the lip f will be upon a level with orslightly higher than the top of the port- 0 when the valve-stem isresting upon the valveseat, as best shown in Fig. 3. The groovef willthen be opposite the port 0.

G indicates a central chamber, which. is formed in the lower part of thevalve-stem, as best shown in Figs. 1 and 3, which chamber is adapted tobe over the passage cl when the stem is resting upon the valve-seat.

9 indicates passages which are formed in the valve-stem on oppositesides and extend from the chamber G to the bottom of the valve-stem, asbest shown in Fig. 1, and are adapted to register with the ports 6 b.The openings of the passages g are preferably shaped to correspond withthe shape of the ports I) b.

g indicate openings or passages which extend from opposite sides of thebottom of the valve-stem and open into the valve-chamber at the groovef, as best shown in Fig. 3. The openings of the passages g at the bottomof the valve-stem are also preferably shaped to correspond with theshape of the ports I) b, with which they are adapted to register.

The top of the valve-stem is preferably squared, so that the stem can bemore easily turned; but any suitable device may be provided foroperating it. The bottom of the valve-stem is flat, so as to be adaptedto rest steadily upon the valve-seat.

The operation of my improved valve is as follows: The valve is connectedat the pipe 0 to a pump or other source of water-supply, and the pipesact are connected with the opposite ends of a cylinder, in which is apiston. Water under high pressure is then forced through the pipe 0.into the valvechamber B on a level with the groove f, as best shown inFig. 3. The presence of the lip f will cause the water to bear upwardlyupon 7' the valve stem and so equalize the pressure within the valvethat the valve-stem is approximately balanced and may be easilyoperated. When the valvestem is in the position shown in Fig. 1, thewater after entering the chamber through the port a will pass around thevalve -stem through one of the passages g and out through the port 12and passage 0., since when the valve-stem is in the position indicatedone of said passages 9' will register with the port I). The water willbe prevented from flowing through the other passage g because of thefact that said passage will be over the solid portion of the valveseat.After passing through the passage a the water will pass to the cylinderabove referred to, where its pressure may be utilized to drive thepiston in the usual manner. In order to return the piston to theopposite end of the cylinder, the valve is turned so that the pressurewill be transferred to the other end of the cylinder to force the pistonback. In

' using my improved valve when the pressure of the water is through thepipe at to the cylinder and the pipe a is connected with the oppositeend of the same cylinder as the water from the pipe at forces the pistonto the opposite end of the cylinder what may be called the spent waterwill be forced from the cylinder through the pipe a and passage 9 intothe central chamber 61 in the valvestem, whence it may flow back to thereservoir to be pumped through the valve again, as hereinbeforesuggested. To reverse the valve in order to throw the water into theother end of the cylinder to which the valve is attached, the valve-stemis so turned that one of the passages g will be over'or register withthe port b'. The pressure of the water will then be through the pipe atto the cylinder, and the return flow of the water will be through thepipe or.

I have described one way in which my improved valve may be used; but Ido not wish to limit myself to the use described, as it may be used withvarious kinds of machinery.

In the drawings I have shown two passages g and two passages g but, ifdesired, the valve-stem may be provided with two passages g and one g orwith two passages g and one g. Either of the above forms may be usedwith a cylinder in which the pressure of the water is transferred toopposite ends of the cylinder to drive a piston, as hereinbeforedescribed.

'By making the bottom of the valve-stem flat and resting it upon a flatvalve-seat wear is in a great measure compensated for, and

the valve will therefore last much longer than valves heretofore usedfor a similar class of work. The connections are also rendered muchtighter, so that leakage is avoided.

That which I regard as new, and desire to secure by Letters Patent, is

1. The valve-casing A, having the cylindrical valve-chamber B, the flatvalve-face D, the central outlet-passage d, the lateral port 0, openinginto the valve-chamber above the Hat valve-face thereof, and the pair ofinlet and outlet ports I) Z), both opening upwardly at different pointsthrough the flat valve-face which constitutes the bottom wall of thecylindrical valve-chamber,in combination with the valve-stem F, providedwith the vertical central chamber G, the vertical passages g g,

arranged round the latter, separated from each other, and closed attheir lower ends by the fiat valve-face at the bottom of thevalvechamber, and the peripheral groove f, opening at opposite sides ofthe valve-stem into the passages g, substantially as described.

2. The valve-casing A, having the cylindrical valve-chamber B, the flatvalve-face D, the central outlet-passage d, the port 0, opening into thevalve-chamber above the flat valve-face thereof, and the inlet andoutlet ports I) I), both opening upwardly at different points throughthe flat valve-face of the valvechamber, in combination with thebell-shaped valve-stem F, having a flat lower end and "provided with acentral chamber G, the passages g g, arranged round the latter andclosed by the flat valve-face of the valvechamber, the peripheral groovef, opening at opposite sides into the passages g, and the lip f, locatedabove the peripheral groove for equalizing the pressure and balancingthe valve-stem, substantially as described.

GILBERT ANDERSON. Witnesses.

JOHN L. J ACKSON, RALPH VANDYKE.

ITO

